These are instructions on how to jailbreak any iPhone (including the iPhone 4) on iOS 4 using JailbreakMe by Comex.
Step Two
Press to select the address bar and input http://jailbreakme.com then press the Done button.
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Press to select the address bar and input http://jailbreakme.com then press the Done button.
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Congratulations you are done! You may now continue by installing UltraSn0w to unlock you device once its updated.
A big thanks goes to Comex and the iPhone Dev-Team for their efforts and successes.